We want to share a simple stonefloor model from a project we currently working on. Maybe someone of you find it useful.
The different stone tiles are placed by hand and are textured with the MultiTexture Map plugin which you can find here for free: cg-source.com

The model comes with 30 different stone tile textures. There are the same maps in the reflection and glossiness slots, just with 0% saturation and bit of blur in glossiness. We don’t use this floor for mega-closeups. So this really does the job and it’s not necessary to generate custom gloss-maps for this. But with some extra effort you can doubtless pimp up some of the reflection details.